Providing Predictable Routing Paths

• C&W (previously mci.net) Routing Policy

  • Local Pref All Routes Received from Customer Peers
  • Problem: Some US-based Downstream providers hear Digital Island through International Points

    • equal AS Hops
  • Solution: Force Peers who are C&W customers not to Advertise to C&W

• UUNET

  • No local-pref default, but similar policy for controlling routing within net

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